xiaotianquan glazing

却说吕洞宾初次出家，就得锺离权赐他混元八卦道袍，披在身上。此袍本来不怕水火，不畏刀兵。但是刚巧第一次碰到的对头，乃是二郎神的哮天犬。此犬可不比寻常兽类，他从上古以来，一直苦修勤炼，虽然未成仙道，却也成了万劫不坏之体。它的牙齿，又经过千磨万煅，曾随它的主人立过不少功劳，咬死不少妖人鬼怪。自然它那一咬的力量，比平常的刀兵水火，都要厉害到十多倍了。何况那时吕洞宾正是一心为好，只存著救它的念头，怎能防到它一出画圈，正在头昏脑胀的时候，心中又恨极了敌人。它更想不到洞宾展开画图，是为了救它的性命，只想这一派的人，全是它的仇敌，哪里会无端的跑出这样一个救星来呢？因此趁著画图展开的气势，也不问画图如何能开？也不管持画的是什么人？它为了报仇起见，为了逃命起见，总之都不能不拼命向他咬去。上文说过，洞宾的道袍，原只能抵御寻常的水火刀兵，却不能抵抗这哮天犬的牙齿。无意中经它突然一口，咬在小腿子上，自然忍受不住，大喊一声，晕扑于地。这便是俗语传说「狗咬吕洞宾，不识好人心」一幕故事儿。

废话丢开，再说吕洞宾的道袍，抗不得哮天犬的牙齿，所以一经被咬，便尔晕扑。原因他此时还是血肉之体，怎能受得住妖精所不能受的苦痛。但以哮天犬的厉害，多少妖精死在它的牙齿之下，而吕洞宾独只受伤扑地，还得保全他的性命，这却又不能不归功于道袍遮护之功了。

It is said when Lu Dongbin started out as a Taoist monk, Zhongli Quan gave him the "Primordial Eight Trigrams" rob. The robe did not fear fire nor water, nor did it fear weapons. However as fate would have it, the first time it was given a challenge, was Erlang Shen's Xiaotian Quan. The dog was no ordinary beast, as had trained since the ancient times, and while it was no Xian, it had cultivated an indestructible body. Its teeth had been honed thousands of times, and for its master, it had bitten to death many demons and monsters. Naturally the strength of that bite, was stronger than normal weapons and water and fire by ten times or more. Furthermore, Lu Dongbin had a heart full of good intentions, and simply wanted to save it. So, how could he have thought that once it was released from the drawing, that it was dizzy and hated his enemy. It never occurred to the dog that Lu Dongbin opened up the drawing to save its life, and only thought of him as its enemy, how could this man ever have been his savior? With no questions about how the drawing had opened up, nor any question about who had held the painting, it immediately tried to exact revenge and escape with its life, so it viciously bit Lu Dongbin.

As mention above, Lu Dongbin's robe can only defend against normal fire and water and weaponry, and cannot defend against Xiaotian Quan's teeth. It took an unexpected bite from Lu Dongbin's calf, and Lu Dongbin could not stand such a thing, fainting with a yell. This incident became the basis for the famous idiom, "The dog bites Lü Dongbin, unable to recognize a kind heart."

Putting aside the rabble, Lu Dongbin's robe, though ineffective against Xiaotian Quan's bite, still shielded him enough to prevent fatal injuries. Despite being a mortal at the time, untransformed and vulnerable to immense suffering, he managed to survive the ordeal. Given the hound's prowess, having claimed the lives of countless demons, it was a testament to the protective power of the Eight Trigrams Robe that Lü Dongbin, though grievously injured, escaped with his life.

八仙得道/Attainment of the Eight Immortals, Translated by Yueyue21